Ardeirhynchus is a monotypic genus of parasitic worms belonging to the family Polymorphidae.

[2] Its sole described species is Ardeirhynchus spiralis (Rudolphi, 1809), which is found in Northern America.

[3] The National Center for Biotechnology Information does not indicate that any phylogenetic analysis has been published on Ardeirhynchus that would confirm its position as a unique genus in the family Polymorphidae.

This stage involves penetrating the wall of the mesenteron or the intestine of the intermediate host and growing.

[9] There are no reported cases of A. spiralis infesting humans in the English language medical literature.